Transmission for engines



A. L. POWELL.

`mwswnssnm Foa ENGmEs. ,APPLICATION FILED DEC. 8, 1.9*20- Patented July 12, 1921.

4 SHEETS-SHEET l.

A. L. POWELL.

. TRANSMISSION FOR ENGINES.

APPLICATION FILED DEC. 8,1920.

Patented July v12, 1921.

4 SHEETS-SHEET 2- A. L. POWELL.

TRANSMISSION FOR ,ENG|NES.

APPLICATION FILED DEC. 8, 1920.

Patented July 12, 1921.

4 SHEETS-SHEET 3.

I -Ily IBI@ A. L'. POWELL.

TRANSMISSION FOR ENGINES.

APPLICATION FILED DEC. B, 1920.

4 SHEETS-SHEET 4.

Patented July 12, 1921.

ALvAH n vrowiinr),l ormrnns rownn co., omi/:ILES

. TRANSMISSION Fon ENGINES;

` y `.application To allee/wm' t may concern:

Be it knownr that I, ALVAH L.\:l?owELL,

`citizen of `the United States-,residing.-at

iles City, .inthe county of, Custer and Stateof'Montana, have invented certainfnew and usefulI Improvements in Transmission for Engines, .f ofwwhich the following is a specification. -f e l 1 4My invention relates to improvements in th transmitting member vof .engines by which I secure a variation inthemovement of the piston with referencev toV that of the crank, enabling me to `gain advantages in the operationoffsuch engines that are not possible with the constructions at present used. This application is an improvement over the form shown in the applications filed simultaneously with this, bearing Serial Numbers 429,168, 429,170 to 429,176, inelusive, but while the the same, I derive advantages from the use of the improvement herein described that are not covered in other applications. My improvement lies in a method of compensating for variations of movement in the transmitting members by which I provide for the angularity of motion of the crank connecting rod in such engines. The means I employ for this purpose are illustrated in the drawings, in which- Figures l, 2, 3 and 4 are elevations, partly in section.

' Fig. 5 is a plan of the piston from the open end, showing the link connections.

Fig.v 6 is an elevation, showing a modification of my compensating mechanism.

Fig. 7 is a sectional view of piston, showing link connections that I show-in the arrangement given in Fig. 6.

ig. 8 is a plan View of the open end of piston, with link connections attached.

igs. 9 and l0 show the transmitting mechanism in Fig. 6 at ydiil'erent points of stroke.

In Fig. 1 the engine piston A has, at its lower end, lugs shown in plan in Fig. 5." These lugs are capped but moved in Fig. 5. The capped lugs, or bearings, support a pin A3. This pin is held from lateral movement by two bushings having shoulders that bear against the lugs and caps A, A5. On the pin A3 are two links A4, A4, Fig. 4, that are shown as integral with the said pin, but they may be separate and attached to A3 by pins or keys.

eIlrY, MolvrAn-meASSIGNoRero man A.

CITY, MONTANA, .it conronAmoN. i

y spe'ification of Letters relient.`

'tOi Crank levers, B, B',4 fb

.-pinions, toothed as general principles are mental pinions.

the caps are re--Av ENT y OFFICE.-

Patented 12,1921.

mea :December 8,1920.. senarnallma'ivz.' 1

on hat areattached y pins B1B1 Fig.

yThe links @my kpint A2,. A2 hung `pitman rods, `A1, `.A1, t

1. The crank levers are Bisuitably supported in theenginekframe. These lever cranks are, in all respects,simi lar` tothoseshown in my previousapplications. Onthe pins B2, Bar'e segmental shownw These pinions' are keyed to the said pins.- The flever cranks, B', B,- sare also keyedthereto, sot-hat any movement of the lever cranks :is transmitted byI the pinions.

- f The plmons. mesh .with ia itoothedl bar, forming part of aI crank connecting rod, such as I would preferably employ. The lower end of this toothed rod B5 is held in relation to the crank of engine by means of a cap, B6, of conventional construction.

On the downstroke of piston its movement will be transmitted to the crank levers B, B, causing the partial rotation of the seg- The motion of these pinions will be imparted to the toothed rod, causing it to move downward and giving motion to thek shaft crank, B7, Fig. 1. As the crank advances, the toothed connecting rod will be thrown on an angle, as shown in Fig. 2. This movement changes the distance between the pinions and toothed connecting rod and, unless means for compensating for the variation were provided, the points of contact of the teeth would so alter that their action would be ineffective at some points of stroke. To provide for this cause the segmental pinions to be placed on the pins B2, B2, eccentrically to the said ins, as indicated position of the connecting proper tooth alinement.

and pitmen A1, A1 comrod, and assurin As the links A4, 4,

pensate for the lateral motion of thelever pivoted `on the' pins p g in Figs. 6, 7,

rtion, but the lateral movement 1an auxiliary means;

imembers.

`inthearrangement of parts by whichI sepiston, a. bar pivoted on said lugs, supporting pins, levers mounted onusaid pins, pins fin said levers,-links from Lthe said bar to the said lasty mentioned pins, segmental pinions eccentrically mounted on the said support- 'ing pins, arcrank shaft, a crank, a connecting rod, racks on said connecting trod, and 'means' whereby the said racks engage the ,said eccentrically mounted pinions, purpose herein described. y

2. In an engine, a dierential transmission member consisting of supporting pins, levers mounted on said pins and [rotatable therewith, pinions Von said pinsV rotatable with said levers, a crank racks on said crank connecting rod and moving between said pinions and meshing therewith, a pin, a bar loosely mounted onsaid pin, a piston, lugs on said piston for supportingsaid pin, andV links from said bar tothe transmission levers, for the purpose vherein described.

- In testimony whereof Iaflix my signature.

` f ALVAH L. POWELL.Av

9. Only one bar is given, but it is evident that two would be required; that is, one on eachv side. These bars are pivoted at 3D1, referably onstuds4 in the `engine frame. his pivoting means is shown inAV dotted lines 9 10. During the stroke of the crank the bar D rocks slightly, as they connecting -rod varies its position with'reference to the segmental -pinions AThe ac, tion is the same as in the former construcis secured by 'that is, bywa pivoted bar, oscillating synchronously with the other It is evident that changesmaytbexmade curethe results I have described without departing from the principle Vofmy invention. I Ydo not limit myself to v:the-exact construction shown. 4 l

What I believe is' new and ask` to have protected by Letters Patent, is:V

1., In a dlferential transmission-member,

the combination of a` piston, lugson said connecting,` rod,

for the 

